31005420342 has 64 divisors (see below), whose sum is σ = 70186314240. Its totient is φ = 9059618304.

The previous prime is 31005420317. The next prime is 31005420367. The reversal of 31005420342 is 24302450013.

It is an interprime number because it is at equal distance from previous prime (31005420317) and next prime (31005420367).

It is a super-2 number, since 2×31005420342² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 187198 + ... + 311534.

It is an arithmetic number, because the mean of its divisors is an integer number (1096661160).

Almost surely, 2^31005420342 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31005420342, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35093157120).

31005420342 is an abundant number, since it is smaller than the sum of its proper divisors (39180893898).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31005420342 is a wasteful number, since it uses less digits than its factorization.

31005420342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124517.

The product of its (nonzero) digits is 2880, while the sum is 24.

Adding to 31005420342 its reverse (24302450013), we get a palindrome (55307870355).

The spelling of 31005420342 in words is "thirty-one billion, five million, four hundred twenty thousand, three hundred forty-two".